<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./js/jquery-2.1.0.min.js"></script>
    <script src="./js/demo13.js"></script>
</head>

<body>
    <table id="tab" border="1px" style="width: 600px;margin-left: 300px;"> 
        <tr>
            <td>姓名</td>
            <td>年龄</td>
        </tr>
    </table>
</body>
</html>